Java tutorial
//package com.java2s; import java.util.Collection; import java.util.Map; import java.util.function.Predicate; import java.util.stream.Collectors; public class Main { public static <Key, Value> Collection<Value> filterMapValues(Map<Key, Value> map, Predicate<Map.Entry<Key, Value>> entryPredicate) { return map.entrySet().parallelStream().filter(entryPredicate).map(Map.Entry::getValue) .collect(Collectors.toList()); } }